I'm no scientist, but I have to call BS on this one.

Discrimination may lead to heart disease.
Ok.

As part of the ongoing Study of Women's Health Across the Nation (SWAN) Heart Study, 181 African-American women, ages 45 to 58, answered questions designed to measure encounters with every day slights, like being ignored, receiving poorer service at a restaurant or being treated with less courtesy than other people.

Discrimination was assessed at different time points and averaged over five years, and the extent of calcium in the arteries of the heart was assessed at the fifth annual follow-up exam.

The researchers found that the more discrimination the women suffered the more likely they were to have calcium in the arteries.

For each 1-unit increase in the chronic discrimination score, there was nearly a threefold higher likelihood of calcification, Lewis and colleagues report in the journal Psychosomatic Medicine.

Even after adjusting for factors known to contribute to heart disease, like high blood pressure, high cholesterol, smoking, older age, and higher body weight, the chances of having calcification remained roughly 2.5-times higher among women reporting chronic discrimination.

Why not study Asian women? Do they suffer any less 'discrimination' than black women?
Could it be that the medical risk factors for black women are so high that you could find a correlation between almost any factor and heart decease?

I wonder what percentage of the women reported chronic discrimination? This could be a very small sample of the study group. If a 10% of the sample reported chronic discrimination and these women had high very risk factors, that could skew your findings.

People of all colors, ages, sizes and disabilities face some sort of discrimination in their lives, some don't notice it, some ignore it, some respond to it, and others embrace it as the reason why their lives didn't turn out the way they planned. Facing 'chronic discrimination' everyday would be a terrible thing, they only problem with the term is how it is defined.

'Being ignored, receiving poorer service at a restaurant or being treated with less courtesy than other people' is in the eye of the slighted. If I was asked by researchers if I experienced this type of 'discrimination', I could honestly answer yes. Do I consider myself a victim of discrimination?
Not a chance.